Prorata rate for Product Add on

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Hi,

In my system, I am using the product add on as an annual recurrence maintenance for specific product.

 

Situation :

Product A (price A)=> product A add on (price PA)

Product B (price B) => product B add on(price PB)

 

Upgrade before it reach 1 year or before the product addon due :

Product : Price B - Price A = new price (which is correct / no prorata)

Product add on : price PB - prorata price PA = new price (which is my issue)

 

My issue

 

Upgrade Product A to B, the product add on price was not calculated based on Prorata rate.

Is there any solution to make it calculate the prorata rate between those 2 product addon?

 

I know we have the prorata option for the products and configurable options, but in this case, I want to use the add on.

 

Is there any possible solution other than buying an addon for this?

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Hi, I'd like to bump this to see if anyone has a solution. My issue is similar - I've got a Product Addon and when the customer adds a new service with an addon, the new service is prorated, but the product addon is not, leading to problems with billing several times per month.